/* * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree.
*/
class AlignmentAdjuster { public: // Returns the resolution alignment requested by the encoder (i.e // `EncoderInfo::requested_resolution_alignment` which ensures that delivered // frames to the encoder are divisible by this alignment). // // If `EncoderInfo::apply_alignment_to_all_simulcast_layers` is enabled, the // alignment will be adjusted to ensure that each simulcast layer also is // divisible by `requested_resolution_alignment`. The configured scale factors // `scale_resolution_down_by` may be adjusted to a common multiple to limit // the alignment value to avoid largely cropped frames and possibly with an // aspect ratio far from the original.
// Note: `max_layers` currently only taken into account when using default // scale factors. staticint GetAlignmentAndMaybeAdjustScaleFactors( const VideoEncoder::EncoderInfo& info,
VideoEncoderConfig* config,
std::optional<size_t> max_layers);
};
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